EP1072158A1 - Method for equivalently connecting subassemblies in 1:n redundancy - Google Patents

Method for equivalently connecting subassemblies in 1:n redundancy

Info

Publication number
EP1072158A1
EP1072158A1 EP19990913100 EP99913100A EP1072158A1 EP 1072158 A1 EP1072158 A1 EP 1072158A1 EP 19990913100 EP19990913100 EP 19990913100 EP 99913100 A EP99913100 A EP 99913100A EP 1072158 A1 EP1072158 A1 EP 1072158A1
Authority
EP
Grant status
Application
Patent type
Prior art keywords
bg
peripheral line
failure
redundancy
assemblies
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19990913100
Other languages
German (de)
French (fr)
Inventor
Gert Hoffmann
Siegfried Huber
Jörg KÖPP
Annette Roder
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q3/00Selecting arrangements
    • H04Q3/64Distributing or queueing
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q2213/00Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/1302Relay switches
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q2213/00Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/1304Coordinate switches, crossbar, 4/2 with relays, coupling field
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q2213/00Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13166Fault prevention
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q2213/00Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13167Redundant apparatus
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q2213/00Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/1334Configuration within the switch

Abstract

According to prior art, a higher-order device controls the equivalent connection of subassemblies in 1:N redundancy. As a result, the dynamic performance of the system is lost. The invention solves this problem by relocating the devices responsible for the equivalent connection processes in the higher-order device. These devices are relocated in an equivalent connection subassembly of 1:N redundancy, said subassembly being provided for equivalent connection purposes. The equivalent connection processes are controlled and monitored by the equivalent connection subassembly itself, thus relieving the higher-order device from these tasks.

Description

1 Description

A method for protection switching of modules in a 1: N redundancy.

The invention relates to a method according to the preamble of claim. 1

Depending on the required reliability of a communication device may be provided on this associated peripheral line assemblies different redundancy structures. Examples include the "1 + 1" - or "1: N" line assembly redundancy, as described in "IEEE Journal on Selected Areas in Communications" VOL. 15, N.5, June 1997, pages 795-806 is described. In a "1 + 1" -Redun- danzstruktur two line assemblies operate in parallel in order to transmit messages about signal currents redundant. In this case, however, only takes into account of these redundant information signal streams, one for the further treatment.

In a "1: N" line assembly redundancy, a single standby line card or protection switching module is provided in addition to a plurality N of line assemblies. When a fault occurs on one of the N-Leitungsbau- groups is then used the replacement tube assembly instead of this.

N redundancy requires a device which carries all the information about current conditions and events within a redundancy group: in the prior art is the equivalent circuit of modules in the first In order for this device is able to decide on necessary measures equivalent circuit. These higher-level device is usually the aintenance technically overarching body of periph- eral assemblies. This device must also be able to perform necessary equivalent circuits in a very short time (<1 s) and to control interference-free downshifts and control 2 so that the down time or data loss of the affected lines is minimized. The failure of a line card is peπpheren in this prior Tech ¬ nik by the respectively adjacent peripheral module ER- known.

In FIG. 2 to better understand the configuration used in the prior art is shown. Accordingly, a "1: N" redundancy -Leιtungsbaugruppen used. By way of example only the peripheral line assemblies BG i, BG> are shown which are in each case assigned to one another in pairs. Both modules have connections V] to one another, on the one gegenseitigige monitoring is carried leads. Furthermore, the peripheral line assemblies BG BG ... r associated internal and external interfaces. The internal interfaces are used as an interface to the modules AMX of the ATM switching matrix, while representing the external interface interfaces to the connected here connecting lines to the further coupling field devices. The assemblies BG BG r ... further include compounds V ^ to the modules AMX of the ATM switching matrix, wherein only the compound V ^ of the assemblies BG i is shown on the modules AMX here. All modules BGι ... BG r and the associated internal and external interfaces are monitored by a ubergeord- Neten means MPSA and controlled.

The following is now assumed that one of the peripheral line assemblies precipitates such as BG. The following is a message M is then μ sold to the parent Mamtenance-Emrichtung MPSA. This then starts a diagnosis in order to isolate the problem and to verify if necessary.

In a first step, an attempt is made to address the failed input direction BGi directly. In the case assumed here, that the relevant peripheral module BG} has a total failure, this is detected by the higher-level device 3 MPSA only after a plurality of monitoring operations. Only then it can be assumed with certainty that the establishment BG: can not be accessed and it is no longer accessible. Then, a diagnosis of the peripheral module in question is triggered to Verifica- cation of the error. Only in the run-up to this diagnosis the affected peripheral module is configured, so the actual equivalent circuit is first performed. For this, the internal and external interfaces are still switch and activate the standby circuit assembly accordingly.

This means in detail, that a message is sent to the standby circuit assembly from the parent device MPSA controlled switching of the external and internal interfaces for protection switching module BG E, and information is sent to the affected applications.

but that is mainly concerned with protection switching measures, the overarching body MPSA, resulting in a loss Dynamikver- the system of impact. Furthermore, a number of other components are integrated into the Umschalteprozeß that are not actually involved in the Umschalteprozeß itself. Here, more valuable time is lost. Ultimately, such a configuration is contrary to the principle of a decentralized arranged Maintenance, where the equivalent circuit is the object of the peripheral devices themselves.

The object of the invention is based, show a way as equivalent circuits for peripheral boards can be performed faster and more efficiently without compromising the dynamics of the system.

The object is achieved on the basis of the features indicated in the preamble of patent claim 1 by the features specified in the characterizing part characteristics. 4 advantage of the invention is in particular that the equivalent circuit or downshift of a defective module is made independently of a superordinate Einrich- processing by the peripheral modules themselves under control of the protection switching module. Here you find the basic principles of the 1 + 1 module redundancy application. The principal operations of the 1 + 1 module redundancy for 1 are: N redundancy largely adopted. This has the advantage that synergies and performance which are already available for 1 + 1 redundancy is available, and for the 1: N redundancy be harnessed. Example is the soft switching between individual peripheral units and the standby circuit assembly in both directions without disconnection with the rescue of charge data. The inventive step is that for the 1: N redundancy using the standby circuit assembly, the principles of decentralized maintenance are consistently implemented, the Umschaltezeiten be greatly improved and the quality of redundancy is improved.

Advantageous developments of the invention are specified in the subclaims.

The invention will be explained in the following using an exemplary embodiment in more detail.

Show it

1 shows a configuration on which enters the inventive method of flow,

2 shows the situation in the prior art,

Fig. 1 a configuration is shown, on the method of the invention reaches the end. Accordingly peripheral line assemblies BGι..BG n are provided, where only 5 2 of this peripheral line assemblies BG i, BG; are shown. Both modules are in pairs associated with one another and have connections ¬ Vi to each other, over which a gegenseitigige monitoring is performed. Furthermore, the peripheral line assemblies BGι ... BG n associated with internal and external interfaces. The internal interfaces are used as an interface to the modules AMX of the ATM switching network, while the external interfaces represent lung devices connected here to the connection lines to the further intermediary interfaces. The assemblies BG ι ... BG n further comprise compounds V 2 to the modules AMX of the ATM switching matrix, whereby here only the connection V 2 of the assemblies BG i is shown on the modules AMX. All modules BGι ... BG n and the associated internal and ex- ternal interfaces are monitored by a higher-level device MPSA and controlled. N redundancy group a BG standby circuit assembly E is provided which is to take the place of failed module when a module fails: Further, in this first Ultimately switch LPS and SB are provided which BEZW the ATM cell flows between the internal. external interfaces and the peripheral line assemblies redirect.

A prerequisite for the inventive method that connections between the protection switching module BG E and all peripheral line assemblies are provided, so that a permanent communication relationships prevails. Likewise, the standby circuit assembly BG E must be able to switch the internal interface of a peripheral line group for protection switching module BG E. Further, the protection switching module BG E must be able to switch the external interfaces of a peripheral line assemblies for protection switching module BG E. Ultimately each peripheral line assembly must recognize the failure of their adjacent peripheral line group to report a message to the standby circuit assembly BG E. 6 In the following, it is assumed that one of the peripheral line assemblies fails. This should be the assembly BG. The failure is of paired construction ¬ group BG; determined via the connection line prior year. Then is transmitted from the module BG 2 a message M E to the standby circuit assembly BG E. Furthermore, the overarching body MPSA, is also informed of a message M A of the failure so that a current image of the system configuration is stored here as before.

The failure of the peripheral line group BG is still detected by the module AMX, comprising a compound of V 2 to the failed peripheral line group BGi as part of the switching matrix. The failure is reported to the higher-level device MPSA a message M PS.

The message M E toward the standby circuit assembly BG E performs the equivalent circuit. First, the internal interface are switched. This is done by driving a switch LPS that accomplishes a switching operation Si. Thereafter, the switching of the external interfaces is effected by controlling a switch SB, the switching operation S: effected. Only after the standby circuit assembly BG E is activated, which is now the function of the failed module BG: has and will handle this led before the failure ATM message cell streams.

The error handling on the parent device MPSA runs completely independent of it. At the present exemplary example is for the equivalent circuit of a peripheral line group in the 1: N redundancy, the separation between the equivalent circuit, which is controlled by the Esatzschaltebaugruppe and the failure treatment by the parent Maint- enancebaugruppe significantly.

Claims

Patentanspr├╝che
Having N redundancy, with peripheral line assemblies (BG BG╬╣ ... n) which are each assigned in pairs to each other, and the compounds (VX with each other, the mutual ├╝ber ├ £ 1. A method for protection switching of modules in a 1 monitoring takes place, at least one standby circuit assembly (BG e) (in the case of failure of one of the peripheral line assemblies such as
BGX takes the place of the failed peripheral line group, as well as with internal and external interfaces are in operative connection with the peripheral line assemblies (BG BGι ... n), and with a übergeordneten means (MPSA), all devices überwacht and controls, characterized in that the failure of one of the peripheral line assemblies daß (eg BG!) from the remaining ones of the paired peripheral line group (zBBG 2) is determined, then daß a message (M e) from the failure of investigating peripheral line group (zBBG 2) to the standby circuit assembly (BG e) is transmitted, whereupon the latter by driving of switches (Si, S 2) switches the internal and external interfaces and only then activates itself.
2. The method according to claim 1, characterized in that daß zusätzlich from the failure of investigating peripheral line group (zBBG 2) a failure message (M A) to the übergeordnete means (MPSA) is sent.
3. The method according to claim 1, characterized in that the failure of one of the peripheral line assemblies (eg BGX daß zusätzlich of a zugehörigen the switch fabric interfaces (AMX) is detected, whereupon from this a message (M PS) the übergeordnete means (MPSA) is sent.
EP19990913100 1998-04-17 1999-03-03 Method for equivalently connecting subassemblies in 1:n redundancy Withdrawn EP1072158A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE19817158 1998-04-17
DE19817158 1998-04-17
PCT/DE1999/000561 WO1999055100A1 (en) 1998-04-17 1999-03-03 Method for equivalently connecting subassemblies in 1:n redundancy

Publications (1)

Publication Number Publication Date
EP1072158A1 true true EP1072158A1 (en) 2001-01-31

Family

ID=7864901

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19990913100 Withdrawn EP1072158A1 (en) 1998-04-17 1999-03-03 Method for equivalently connecting subassemblies in 1:n redundancy

Country Status (4)

Country Link
US (1) US6882621B1 (en)
EP (1) EP1072158A1 (en)
CA (1) CA2328246A1 (en)
WO (1) WO1999055100A1 (en)

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4146749A (en) * 1977-09-16 1979-03-27 Wescom Switching, Inc. Telecommunications network having multi-function spare network block
CA1130900A (en) 1978-02-01 1982-08-31 Kanzi Tawara Time division telephone switching systems
JPH0342023B2 (en) * 1986-01-07 1991-06-25
LU86734A1 (en) * 1986-07-03 1987-06-02 Siemens Ag Circuit arrangement for centrally controlled time division multiplex telecommunication exchanges, preferably PCM telephone exchanges, in connection with groups of a switching matrix connected
DE4002022A1 (en) 1990-01-24 1991-07-25 Siemens Ag High-availability data transmission between two coupled buses - involves two alternative coupling paths monitored and switched as necessary between active and standby operational modes
CA2153128C (en) * 1994-06-30 2001-05-01 Hughes Electronics Corporation System utilizing built-in redundancy switchover control
US5787070A (en) * 1995-06-21 1998-07-28 Cisco Technology, Inc. One for N redundancy in a communication system
US6108300A (en) * 1997-05-02 2000-08-22 Cisco Technology, Inc Method and apparatus for transparently providing a failover network device
JP2728066B2 (en) * 1995-12-07 1998-03-18 日本電気株式会社 Unit switching device
US5790518A (en) * 1995-12-22 1998-08-04 Hughes Electronics Corporation 1-for-N redundancy implementation on midplane
DE19646016C2 (en) 1996-11-07 1999-10-14 Siemens Ag A method for protection switching of transmission devices for bidirectional transmission of ATM cells
US6366557B1 (en) * 1997-10-31 2002-04-02 Nortel Networks Limited Method and apparatus for a Gigabit Ethernet MAC (GMAC)

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9955100A1 *

Also Published As

Publication number Publication date Type
WO1999055100A1 (en) 1999-10-28 application
US6882621B1 (en) 2005-04-19 grant
CA2328246A1 (en) 1999-10-28 application

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